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This task involves collecting representative atmospheric deposition samples from near-shore areas of the Puget Sound region. Ecology will:
Analyze those samples to identify sources of polyaromatic hydrocarbon (PAH) contaminants, and determine the total atmospheric deposition of PAHs to both the surface of Puget Sound and the land near the shoreline of the Sound.
Compare atmospheric loading rates to the sediment burial rates using previously dated sediment core samples.
Estimate the relative contribution of PAHs by source type, such as motor vehicle, marine vessel, or wood burning, and determine the percentage of PAHs in marine sediments that are derived from atmospheric deposition.
Expected Outcome: Improved source apportionment data that will support a comprehensive source control strategy for Puget Sound.
The Department of Ecology's Air Quality Program will oversee this sub-task.
For more information, contact Doug Brown at 425-649-7082.
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.html.
